[Elecraft] P3 SVGA external monitor freezes - RFI?

[Jim Brown]

On 11/5/2014 9:32 AM, mike wrote:
> When using KPA500 my external monitor (and the P3 display) often freezes,
> sometimes up to 5 seconds, after I transmit. With the external display
> disabled, the P3 does not freeze (and incidentally it refreshes much faster
> without the ext monitor enabled.) I also notice a slight flickering of the
> monitor screen while transmitting. I take this to be a RFI problem.

Probably yes. Perhaps a bad cable between the monitor and the P3.

Beads on cables do not solve problems with HF RFI. Multiple turns 
through a bead or core are needed. Study k9yc.com/FRI-Ham.pdf

A neighbor ham gave me a Samsung monitor that has very bad RFI 
susceptibility, and it also generates RF trash. It runs on 12V, but 
running from a 12V battery does not help, and I've not been able to 
solve it with chokes. RF coupling is via internal wiring and poor 
shielding.

73, Jim K9YC